A good conservative approach is to find and eliminate or correct the flaws and defects of government and society.
A good liberal approach is to firstly to improve human rights of ALL the people and secondly to propose valid and well engineered plans and programs.
Republicans are not good conservatives and Democrats are not good liberals. The concepts of conservative and liberal, as stated, are good. However, both the Republican Party and the Democratic Party have diverged from healthy approaches to government and society.